of same place



R. MACE. INSULATOR.

(No Model.)

Panted July 3, 1894.

n gwuemtoz VUJWU UNITED STATES,A

PATENT OFFICE.

ROMAINE MACE, OF NEV YORK, N. Y., ASSIGNOR TO THE INTERIOR OONDUIT ANDINSULATION COMPANY, OF SAME PLACE.

INSULTOR.

SPECIFICATION forming part of Letters Patent No. 522,428, dated July 3,1894.

Application tiled May 3, 1894:. Serial No. 509.890. (No model.)

T o all whom t may concern:

Be it known that I, ROMAINE MACE, a citizen of the United States,residing at New York, in the county of New York and State of New York,have made a new and useful invention in Insulators, of which thefollowing is a speciiication.

My invention is directed to insulators having an especial use inconnection with interior or house wiring and will be understood byreferring to the accompanying drawings, in which- Figure l illustrates asectional view of a joist or other timber through which an insulatingtube is inserted therein and secured thereto by one form of myimprovement. Fig.

2 is a side elevational view of Fig. l as seen looking at the latterfrom the right toward the left hand side of the drawings. Fig. 3 is asectional view similar to Fig. l illustrating a modified form of theinvention as applicable to well known forms of glass or porcelaininsulating tubes. Fig. et is a side elevational view as seen looking atFig. 3 from the right hand toward the left hand side of the drawings.Fig. 5 is a perspective view of a modified form of the invention shownin three independent parts. preparatory to removing them.

In interior or house conduit wiring as now practiced, it often becomesnecessary to pass electric light and other electrical conducting wiresthrough joists, partitions and in places where it is inconvenient toinsert continuous tubing. In doing this it is cutomary to drive shorttubes of insulating material into holes bored in alignment with eachother through the joists or other timbers and to then string theinsulated wires through these consecutively located short pieces oftubing. It has been found, however, that oftentimes the timbers beinginsufficiently seasoned shrink and consequently allow the insulatingtubing to drop out and therefore greatly endanger the insulation of thesurrounding conductors and also that in driving the tubes they arebroken or damaged beyond repair.

My invention has for its objectsfrst, to avoid damaging or breaking ofthe tubes, and second, to secure such tubes in position, re-

gardless of the` condition of the material through which they areinserted and is equally applicable to all kinds of tubular insulatorsadapted for analogous purposes whether the same be used in house wiringor in the cross arms which support telegraph and electric light wires orin analogous places, and to this end it consists in'providing anextension, lug or arm to such insulators and securing the latter, andhence the insulator to the timber through which the insulator is passedby one or more nails, screws, or equivalent holding devices, at the sametime rendering it easy to at any time remove the insulator when desired.

Referring now to the drawings in detail: I represents a well known formof a short piece of insulating tubing of prepared paper surrounded by ametallic casing A, such as is now in general use in interior or housewiring.

J represents a joist or equivalent timber through which a hole has beenbored of suficent size to freely admit the tube I and its surroundingmetallic casing A so that the same may at any time be easily removed,there being no substantial frictional bearing between the casing and thejoist.

B represents a lug or extension, usually of metal, which fits accuratelyover the tube I against one end of the metal casing A and is providedwith a laterally extending arm hav-l ing one or more holes in its outerend adapted to receive a nail or screw N.

C represents an enlarged head or ring of insulating material similar tothe tube I which is put upon the outer end of the tube after the lug orextension B is xed in position. It is then subjected to heat sufficientto unite the two through the agency of the insulating ingredients, suchas coal tar and the like, usually found in prepared paper tubing of thischaracter.

In the modified form shown in Fig. 3,1 represents a glass or porcelaininsulator of well known formV having a groove G near its outer end.Surrounding this insulator groove G is wound a wire W having a lateralor upward extension with an eye or opening R adapted to receive thescrew or nail N.

In the form shown in Fig. 5, the tube Iand the surrounding metalliccasing A are the same as in Fig. 1, as is also the enlarged tubun larhead C.

D represents a struck-up ring of metal having two or more inwardlyprojecting pro-ngs P P and two or more outwardly proj ectin gpron gs P Pp p being toothed serrations. This struck-up ring D is placed upon theouter end of the tube I with the serrated prongs extending inwardly. Theenlarged head C is then placed over the outer end of the tube I anddriven so that the prongs P P enter the head. The two are then heated inthe same manner as before described and the parts united through theagency of the insulating medium in the tubular parts C and I. Thecompleted tubing is now ready to be driven into position on inserting itin the opening in the j oist, the serrated prongs P P now entering thejoists and serving the same function as do the nails N N in Figs. 1 and3.

I do not limit myself to the special means herein shown for securingshort insulating tubes in timbers and in other places as I believe it isbroadly new to secure such insulating tubes through means other than bythe friction between the tubes and the surrounding timber, and my claimscontemplate broadly the application of means for securing shortinsulating tubes in position in openings in timbers and analogousplaces.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is-

1. A tubular insulator having a lateral eX- tension near one end adaptedto secure it to a timber or support through which it is inserted.

2. A tubular insulator inserted in an opening in a timber or support andprovided with a lug or extension, in combination with means for securingsaid lug or extension to the timber or support.

3. A tubular insulator located in an opening in a timber or support, incombination with a fastening device surrounding one end of theinsulator, and one or more screws or nails passing therethrough into thetimber or support.

In testimony whereof I have hereunto subscribed my naine this 28th dayof April, 1894.

ROMAINE MACE.

Witnesses:

C. J. KINTNER, M. M. ROBINSON.

